<template>
  <div id="search">
    <form action="/">
      <van-search
          v-model="searchText"
          show-action
          placeholder="请输入要搜索的标签"
          @search="onSearch"
          @cancel="onCancel"
      />
    </form>
    <van-divider>已选标签</van-divider>
    <div v-if="activeIds.length === 0">请选择标签</div>
    <van-row gutter="16" style="padding:0 16px">
      <van-col v-for="tag in activeIds">
        <van-tag :show="true" closeable size="medium" type="primary" @close="doClose(tag)">
          {{ tag }}
        </van-tag>
      </van-col>
    </van-row>
    <van-divider>选择标签</van-divider>
    <van-tree-select
        v-model:active-id="activeIds"
        v-model:main-active-index="activeIndex"
        :items="tagList"
    />
  </div>
  <div style="padding: 12px">
    <van-button block type="primary" @click="doSearchResult">搜索</van-button>
  </div>
</template>
<script setup lang="ts">
import {ref} from "vue";
import {useRouter} from "vue-router";

const searchText = ref('');

const router = useRouter();
/**
 * 标签列表
 */
const originTagList = ref([
  {
    text: '性别',
    children: [
      { text: '男', id: '男' },
      { text: '女', id: '女' },
    ],
  },
  {
    text: '年级',
    children: [
      { text: '大一', id: '大一' },
      { text: '大二', id: '大二' },
      { text: '大6', id: '大6' },
      { text: '大5', id: '大5' },
      { text: '大4', id: '大4' },
      { text: '大3', id: '大3' },
      { text: '大2', id: '大3' },
      { text: '大11111', id: '大11111' },
    ],
  },
]);

const tagList = ref<any>(originTagList);

/**
 * 搜索过滤
 */
const onSearch = () => {
  tagList.value = tagList.value.map((parentTag: any) => {
    const tempChildren = [...parentTag.children];
    const tempParentTag = {...parentTag};
    tempParentTag.children = tempChildren.filter(item => item.text.includes(searchText.value));
    return tempParentTag;
  })
};
const onCancel = () => {
  searchText.value = '';
  tagList.value = originTagList;
};
//已选中的标签
const activeIds = ref<any>([]);
const activeIndex = ref(0);

//移除标签
const doClose = (tag:any) => {
  activeIds.value = activeIds.value.filter((item: any) => {
    return item !== tag
  })
}

const doSearchResult = () =>{
  router.push({
    path: '/user/list',
    query: {
      tags: activeIds.value
    }
  })
}
</script>

<style scoped>
#search{
  margin-bottom: 20px;
  padding-bottom: 20px;
}
</style>